正多边形干式煤气贮柜的自振特性和地震响应分析
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摘要
本文对正多边形（MAN型）大型干式煤气贮柜壳体钢结构进行了研究，建立了柜体结构的力学模型，用子空间迭代法分析了它的自振特性，并计算了它在地震作用下的响应。研究发现，MAN型气柜结构的基本振型是悬臂梁振型，地震响应以第一振型为主。本文给出了基本周期的计算公式。
This paper proposed a mechanical model for structural analysis of the MAN dry gash-olders.The natural vibrational characteristics and earthquake response of the regular polygonal dry gas-holder are analyzed by the subspace iteration method. It is found that the first vibration mode is ofthe cantilever beam type, and the main earthquake response of the dry gasholder is primarily of thefirst vibration mode, the shell type vibration modes being of little importance from the practicalPoint of view. Simple formula for calculating the fundamental period of vibration has beensuggested.
This paper proposed a mechanical model for structural analysis of the MAN dry gash-olders.The natural vibrational characteristics and earthquake response of the regular polygonal dry gas-holder are analyzed by the subspace iteration method. It is found that the first vibration mode is ofthe cantilever beam type, and the main earthquake response of the dry gasholder is primarily of thefirst vibration mode, the shell type vibration modes being of little importance from the practicalPoint of view. Simple formula for calculating the fundamental period of vibration has beensuggested.
引文
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